Answer Posted / pratap

There are mainily 3 types of triggers
1> DML Trigger
2> Instead of Trigger written on only view
3> System Trigger

DML Trigger written on table that gets fired on DML events
like
insert or delete or update operation
that trigger may fire
1> After dml event
2> Before dml event these are timings for trigger firing

Instead of trigger written only on view that view is not
modifiable that also gets fired
when dml event occurs

System trigger gets fired on system event like
before log off or after log on or before shutdown
this trigger may be written on
Database level
Schema level

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